Phineas and Ferb: Across the 2nd Dimension Song Sampler is a digital soundtrack that is is in the digital copy disc of the Across the 2nd Dimension DVD. It contains 8 songs from the movie including I Walk Away sung by Olivia Olson which was not included in the previous soundtrack. It is the 8th soundtrack of the series as well as the 3rd digital soundtrack of the series, and the 2nd soundtrack for the movie.
- Everything's Better with Perry - Robbie Wyckoff
- Brand New Best Friend - Heinz Doofenshmirtz and Heinz Doofenshmirtz (2nd Dimension)
- Summer (Where Do We Begin?) - Phineas Flynn
- [[I Walk Away] - Olivia Olson
- Brand New Reality - Robbie Wyckoff
- Robot Riot - Love Händel
- Takin' Care of Things - Dan Povenmire and Danny Jacob
- Mysterious Force - Candace Flynn
Phineas and Ferb-ulous: The Ultimate Album
Phineas and Ferb: Rockin' and Rollin'